Generator ventilator



Jan. 15, 1935. 1.. A. KOCH, JR

GENERATOR VENTILATOR Filed June 14, 1934 Patented Jan. 15, 1935 UNITED. STATES PATENT OFFICE 1,988,430 GENERATOR vauma'ron Louis a. Koch, In, Louisville. Ky. Application June 14, 1934. Serial No. 730,653

a cum. (or. 171-252) within the generator that has been heated as a result of the operation of said generator.

Another object is to provide a simple eifective integral equipment to convert the dynamo from a closed to a forced draft ventilated machine by means of a minimum outlay of material, labor and money. v

Examples of the incident invention are illustrated in the accompanying drawing.

Drawing Figure 1 is a, side elevational view of a portion of a generator housing equipped with my generator ventilator.

Fig. 2 is a front elevational view of Fig. 1.

Fig. 3 is a side elevational view taken from the reverse side of Fig. 1.

Fig. 4 is a cross sectional view of an enlarged scale of a section taken through that portion of Fig. 2 adjacent the arrow A and on the line as indicated.

Fig. 5 is a front elevational view of tion Osman.

Fig. 6 'isa side elevational view of Fig. 5, also a section ofthe end of the generator housing on which it is located,

Structure a modifica- Numeral 10 represents a section of a shell, housing or field frame construction of a dynamo electric machine, such as a generator employed on automotive vehicles for supplying current for the operation of electrical appurtenances carried thereon.

11 indicates hand hole openings or "windows in the housing and 12 represents a flexible band ately adjacent, and -largely surrounding this aperture. iunnelled hood 15 has been attached. The front or open end of this hood has been equipped with a filter medium 16 reinforced with coarse wire mesh 17. It will be noted that the hood has been so constructed that the exposed surface of the filter medium will repose on an angle to the perpendicular and that the lower edges of the medium have been lodged-outside of the collar 14A in order that entrained water will be arrested by the filter where it will trickle downward in response to gravity and drain oil the outer surface of the strap, where it cannot damage the interior of the dynamo. Another portion of the window strap 12 has been pressed to form a series of cups 18 to receive the ends of latch 19. The object of this being to provide not only a latch but means for adapting the strap to various diameters of housings without the use of tools or other devices. The aforedescribed structure represents a preferred form of my generator ventilator.

Ordinarily the generator is supplied from the manufacturer with a cover strap without openings and serves only as a closure for openings 11. It is a simple procedure, frequently involving only a minute or two, to substitute my generator ventilator for the old strap and thereby instantly provide means for a dependable supply of filtered fresh air which enables the generator to safely carry an increased volt ampere load.

In Figs. 1 and 6 the group of arrows B are shown to indicate a stream of air coming from a radiator coolingfan as is commonly found on self propelled vehicles. Again these arrows may be regarded as also representing a stream of air created by the movement of the vehicle. This portion of the air stream can be regarded as the windward side when'viewed from the mouth of hood 15. The other group of arrows indicate the air leaving the generator. A portion of the air stream longitudinally traversing the exterior of the generator is diverted by louver 15, or its equivalent, into the interior of the generator housing, and is forced across the commutator and brushes and then out of the generator via openlugs 13 or 22 thereby producing eifective cooling for such parts that are normally subjected to relatively high temperatures. Thus it will be perceived that a steady change of air will be passing over the diagonal .louvers 13 ejects or sucks air from said interior.

Modification The flexible strap 12 has been made with two groups of louvers 13, one set as shown in Figs. 1 and 2, while the other-group was reversed, i. e. the openings were turned to windward (not illustrated).

In Figs. 5 and 6 a shell 20, has been employed in place of the band or strap 12 in the former figures. It has been so fashioned that it 'fits entirely over the end of the housing so as to cause the openings of the housing to register with those of the shell. The hood-"21 is substantially the same as hood 15, although diflerent in pro-.

portions. Small cupped hoods'22 are shown attached to the shell with their openings directed to leeward so as to enable them to function similarly to the method given in connection with louvers 13. These cups 22 have been formed with an arcuate base to enable them to conform to the contour of rigid shell 20, which is at variance to the structure shown in Fig. l, where it was highly desirable to maintain the flexibility of strap or band 12, and at the same time utilize the air stream to function in connection with the openings of the louvers to produce a siphoning efiect and thereby eject air fro'in the interior of housing 10.

This application is a development from the principles disclosed in my co-pending application, No. 641,481, filed November 1932.

Still further developments and modifications can and have been made without departing from the spirit of this invention, therefore, I wish to be limited only by the attached claims.

I claim:

1. Means for cooling a'dynamo, having associated therewith astream of air, comprising a dynamo having a substantially closed housing, hand hole openings in the housing, a flexible band encircling said openings, said band being equipped with a funnelled opening positioned to windward in said stream of air so as to divert a portion ofsame into the dynamo, said band also being equipped with an opening positioned to leeward in said'stream, thereby producing a siphoning eiTect on the airwithin said housing.

2. Means forfcooling a dynamo, having associated therewith astream of air, comprising a dynamo having'a substantially closed housing, hand hole openings in the housing, a flexible band encircling said.- openings, said band being equipped with a series of diagonal openings positioned to windward in said stream of air so as to divert a portion of. same into the dynamo, said band also being equipped with another series of openings positioned to leeward in said stream, thereby producing a siphoning efiect on the air within said housing.

3. Means for cooling a dynamo, having associated therewith a stream of air. comprising a dynamo having a substantially closed housing. hand hole openings in the housing, a member encircling said openings, said member being equipped with an opening positioned to windward in said stream of air so as to divert a portion of same into the dynamo, said member also being equipped with an opening positioned to leeward in said stream, thereby producing a siphoning eifect on the air within said housing.

4. Means for cooling a dynamo, having associated therewith a stream of air, comprising a dynamo having a substantially closed housing, hand hole openings in the housing, a flexible band encircling said openings, said band being fashioned with an outwardly flanged opening, the latter having associated therewith a hood which with a portion of said band forms an open mouth, an air; -filter medium lodged in said mouth, said-mouth being positioned to windward in said stream of air so as to divert a portion of same into the dynamo, said band also being equipped with an opening positioned to leeward in'saidstream, thereby producing a siphoning efiect on the air within said housing.

5. Means for cooling a dynamo, having associated therewith a stream of air, comprising a dynamo-having a substantially closed housing, hand hole openings in the housing, a member encircling said openings, said member being fashioned with an opening, the latter having associated therewith a hood which with a portion of said member forms an open mouth, an air filter medium lodged in said mouth, said mouth being positioned to windward in said stream of air so as to divert a portion of same into the dynamo, said member also being equipped with an opening positioned to leeward in said stream, thereby producing a siphoning efiect on the air within said housing.

6.'Means for cooling a dynamo, having associated therewith a stream ,of air, comprising a dynamo having a substantially closed housing, hand hole openings in the housing, a flexible band encircling said openings, said band being fashioned with an opening, the latter having associated therewith a hood which with a portion of said band forms an open mouth, an air filter mediumlodged in said mouth, said mouth being positioned to windward in said stream of air so as to divert a portion of same into the dynamo, said band also being equipped with an opening positioned to leeward in said stream, thereby producing a siphoning effect on the air within said housing.

7. In combination with a dynamo having an air stream associated therewith, the housing of same being provided with holes therethrough, a detachable member associated with said holes, said member being equipped with a louver, said louver being open to the atmosphere only on one side and organized to cooperate with said air stream and conduct a portion of same to the interior oi said dynamo, said member also being equipped with an outlet opening in communication with said holes and the interior of the dynamo.

8. In combination with a dynamo having an air stream cooperating with said louver to force an exchange of air within the housing for external air.

LOUIS A. KOCH, JR. 

